In the Permitted Route Falkirk to Glasgow thread, PaulLothian asked and In 1996, the first National Routeing Guide contained a small list of 12 Local Easements which were just that, relaxations of Routeing Guide rules to allow journeys that strict adherence to the rules would forbid. Unfortunately, a few years later the train companies started to add to the list a large number of rules which were not Easements at all. They were, and are, extensions of Routeing Guide rules to prohibit journeys that strict adherence to the rules would allow. One example is But this particular rule has limited application. For example, it does not seek to restrict customers travelling between Glasgow Queen Street and Haymarket, who may continue to travel via Larbert. The train companies then played fast and loose with the English language by calling these prohibitions Negative Easements and listing them in a single document called Easements. These so-called Negative Easements continue to proliferate. Only yesterday, more were added. See the Easements thread. But these are no longer the only types of Easements. The National Routeing Guide Data Feed Specification tells us that there are now seven types of Easement: Local easement Map easement Routeing point easement Doubleback easement Fare route easement Manual easement Circuitous route easement and that for each of these types the Easement can be positive or negative. Many of the Easements make very little sense to the passenger. For example, yesterday this rule was added: The day before yesterday, when this Easement did not exist, whenever we travelled from Burton On Trent via Chesterfield, we went via Derby. It's the only sensible way to go! The value of telling us that we're allowed to do that is not immediately obvious. Suggestions for sorting out this mess would be very welcome. The 12 original, genuine Easements were: Customers travelling from Harling Road, Eccles Road, Attleborough, Spooner Row or Wymondham may travel to Norwich and double-back when holding tickets to Ely and all other destinations beyond Ely. Customers may double-back between Barnetby and Grimsby Town when changing between the Doncaster to Barnetby and the Lincoln to Barnetby Lines. Customers for St Ives, Carbis Bay, Lelant and Lelant Saltings from stations east of St Erth may travel via Penzance. Customers for Selby travelling from Doncaster and south of Doncaster may travel via York. Customers for Dunbar may travel via Edinburgh provided that the fare paid is the same as Edinburgh. Customers travelling to Chathill from the north may change trains at Alnmouth on a ticket issued to Chathill. Customers travelling from Carlisle/Newcastle or stations south thereof to stations between Carstairs and Glasgow may travel via Glasgow Central. Customers with tickets routed via London may double back between Clapham Junction and Victoria. Customers travelling from or to stations in the area bounded by Kings Langley, Kempston Hardwick and Milton Keynes inclusive may travel via Northampton to Rugby. Customers may double back between Seamer and Scarborough when changing between the Hull to Scarborough and the York to Scarborough lines. Customers with tickets routed via London may double-back between Clapham Junction and Waterloo. Customers travelling to or from stations in the area bounded by Rochester, Sheerness, Selling and Margate inclusive may travel via Bromley South to and from Sevenoaks, Bat & Ball, Otford and Shoreham (Kent).